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4x-2y=3

solve for y but please tell me in steps how to do it

2007-01-29 13:09:56 · 5 answers · asked by paperhearts 4 in Science & Mathematics Mathematics

Thank you smart people.. I was almost right just wasnt sure what to do with the -2

2007-01-29 13:21:26 · update #1

5 answers

4x-2y=3
To get y by itself, subtract 4x from each side. You will be left with
-2y=-4x+3
Now, get rid of the -2 by dividing. Now you have
y=-4/-2x+3/-2
Simplify
y=2x-3/2

2007-01-29 13:17:40 · answer #1 · answered by Miss Karen 1 · 0 0

Hmm, Just that?

Hmm, from what i can see, -2y = 3 -4x then 2y = 4x -3 then y =2x -1.5

Or 4x= 3+2y, then x = 3/4 + 2/4y

Thus for x(0), 2/4y = -3/4, y= -3/2
Then for x(1), 1=3/4 +2/4y, 1-3/4 = 2/4y , y =1/2

then use this 2 points to plot your graph.

2007-01-29 13:23:39 · answer #2 · answered by larry_lum 1 · 0 0

In all linear equations with two varibles, both variables always have infinite possibilities. This is no different. The value of y depends on what value x assumes. If x is 0, y is -3/2. If x is 1, y is 1/2. And so on. In this case x is said to be the independent variable as it is free to assume any value and y is said to be the dependent variable as its value depends solely on the value of x.
There are special types of equations called simultaneous equations which can be solved for both variables. In these questions, two equations are given with two variables. The variables can have only one value in order for both equations to be satisfied. Here's an example,
Solve for x and y:
2x + 3y/2 = 24,
x - 3y = -2
You must relate the two equations till you get the values of the variables that satisfy both equations.

Back to your question, the equation you provided can only be graphed on an x-y graph and not solved.

2007-01-29 13:23:29 · answer #3 · answered by Akilesh - Internet Undertaker 7 · 0 0

when the question asks you to solve for y it is asking you to get y on a side all by itself. the big thing to remember when trying to get y all by its self is that if you do something to one side of the equation, you need to do it to both. starting with the equation 4x-2y=3 you can subtract 4x from both sides. doing this will eliminate the 4x from the side with the y. this leaves you with -2y=3-4x. the last step is to divide both sides by negative two, dividing by two leaves you with just y on the left side of the equation and -3/2 +4/2x on the right side. giving you a final answer of y=-1.5 +2x

2007-01-29 13:18:13 · answer #4 · answered by andrew R 2 · 0 0

4x-2y=3
-2y=3-4x
y = -(3-4x)/2

not possible to go any further, since one equation with 2 unknowns. But if you substitute, for example, x=1, then you would get y=1/2

2007-01-29 13:19:10 · answer #5 · answered by Anonymous · 0 0

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